Apr 18 – 22, 2011
Palais des Papes, Avignon
Europe/Paris timezone

Primordial fluctuations and non-Gaussianities in a Galilean theory

Apr 18, 2011, 5:30 PM
15m
Chambre du Trésorier (Palais des Papes, Avignon)

Chambre du Trésorier

Palais des Papes, Avignon

Speaker

Dr Sebastien Renaux-Petel (University of Cambridge)

Description

We consider a multi-scalar-tensor model of gravity in which the action contains higher-order derivatives of the scalar fields without introducing extra propagating degrees of freedom. In the context of an inflationary era, we study the background evolution of this model as well as the linear and non-linear properties of the cosmological fluctuations it generates. Orthogonal non-Gaussianities are shown to arise for the first time in a concrete model and new shapes of non-Gaussianities are identified.

Primary authors

Dr Kazuya Koyama (University of Portsmouth) Dr Sebastien Renaux-Petel (University of Cambridge) Dr Shuntaro Mizuno (University of Portsmouth)

Presentation materials